Sound field controlling apparatus

a control apparatus and sound field technology, applied in the direction of transducer casings/cabinets/supports, electric transducers, transducers, etc., can solve the problems of unstable howling and affect the sound quality, and achieve the effect of improving clarity and quality

Inactive Publication Date: 2007-03-15
YAMAHA CORP
View PDF7 Cites 58 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013] It is an object of the present invention to provide a sound field controlling apparatus that is stable against how...

Problems solved by technology

A public-address system is necessary when a speaker and an audience are in the same room and the audience cannot hear sufficiently what the speaker says because the room is large to some extent.
However, when the spe...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sound field controlling apparatus
  • Sound field controlling apparatus
  • Sound field controlling apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023]FIG. 1 is a block diagram showing a structure of a sound field controlling apparatus according to a first embodiment of the present invention. In this drawing, a reference number “10” represents a hall or meeting room equipped with a public-address system applying the sound field controlling apparatus according to the first embodiment of the present invention, and a reference number “11” represents a microphone for picking up a voice of a speaker. Although the number of loudspeakers may be one or plural, this embodiment uses a plurality of loudspeakers 210-21n on a front side (a left side in the drawing) and a ceiling of the meeting room 10, and the voice picked up by the microphone 11 is sounded from the loudspeakers 210-21n. Moreover, on the ceiling of the meeting room 10, a plurality of sensors 221-22m for detecting a position of a sound source so that a position of the speaker (a source position) can be detected.

[0024] Besides, the source position detecting sensors 221-22...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A sound field controlling apparatus for a public-address system comprises a microphone that picks up a sound of a speaker, a loudspeaker that sound a sound signal based on the sound picked up by the microphone, a sound source position detector that detects a position of a sound source, and a signal processor that controls a level, delay time and equalizing property of the sound signal output to the loudspeaker in accordance with the sound source position detected by the sound source position detector.

Description

CROSS REFERENCE TO RELATED APPLICATION [0001] This application is based on Japanese Patent Application 2005-267181, filed on Sep. 14, 2005, the entire contents of which are incorporated herein by reference. BACKGROUND OF THE INVENTION [0002] A) Field of the Invention [0003] This invention relates to a sound field controlling apparatus used in a public-address system. [0004] B) Description of the Related Art [0005] A public-address system is necessary when a speaker and an audience are in the same room and the audience cannot hear sufficiently what the speaker says because the room is large to some extent. [0006]FIG. 5 shows an example of a structure of a conventional public-address system. In the example shown in the drawing, a microphone 71 and a plurality of loudspeakers 800-80n are equipped in a hall or meeting room 70, and a voice picked up by the microphone 71 is reinforced so that the audience can hear the voice from the loudspeakers 800-80n. At this time, acoustic feedbacks w...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04R27/00
CPCH04R27/00
Inventor SAWARA, SHINICHIMIKI, AKIRAITO, ATSUKO
Owner YAMAHA CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap